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[unlucky mark mv6]

Could well be the bearing in the tensioner starting to give up. I've had to change these on both miggy's ... only a 15 minute job and a new pulley can be got without having to buy the whole tensioner....

Part no. 9157962  back in March 08 it was £23.05 +vat 

I think it is the same for all miggy's .. but that was the one for the 3.2 ....

which tensioner are talking about mate,is it the aux belt tensioner,and is there an how to on here anywhere.

[Varche]

I don't know if there is a guide or not but it is covered well on the cambelt change DVD available from OOF.

When you try running the engine for a short time without the aux belt on that should help locate the noise. Do make a drawing of which way the belt goes for ease of replacement. The AUX BELT tensioner is the top left pulley looking from the front. You slacken the belt tension by putting a 15mm (from memory) spanner on it.

The tensioner assembly is like a bracket with the wheel on it and the bracket is located by two bolts going into the engine from the front left wheel side of the block. A bit fiddly without a good assortment of extension bars but otherwise easy enough.

When it is off spin the wheel and check for play. It might just be the bearings are dry. You can repack them with grease on both sides by first carefully prising off the washer like cover . When packed just press the cover back on.

varche

[Entwood]

What Varche says is all true .. to replace the whole tensioner assembly......   but just the pulley can be changed on its own .. takes less than 15 minutes.

Spanner on pulley centre bolt, clockwise direction (I think) to slacken tension....  remove belt. Then just undo that centre bolt normally to remove the pulley. Replace with either a new pully or regreased original. Once done up then replace belt and hold tension on the pulley .. do NOT allow the pulley to slam onto the belt, release it slowly.

This is well covered in the Haynes "book of lies" ... I've now done it on both miggy's ...

[unlucky mark mv6]

Thanks for the info boys.Thought of something else today,i jet washed the engine about 3 weeks ago,so weather that has blasted any grease out of it i dont know,but something to keep in mind.Also jet washed my bike off awell,and now the back wheel bearing is playing up,so its probably down to my own stupidity.

[unlucky mark mv6]

Sorted today,turned out it was the bearing in the aux tensioner,so a big thanks to all for the info.